Regulating means for hydraulic nozzles.



.l. AU 9 1 du 1 V.. A M D YE AT .N E T A P REGULATING MEANS FOR HYDRAULIC NOZZLES. A

APPLICATION FILED AUG. 29, 1905.

lY NEEEE EA'E Enron.

GEORGE J. HENRY, JE., oF sAN ERANcrsco, cALrEoENIA.

saurai-Ime MEANS Fos simmons@ Nozzles.

kTo will whom it may concern,.- A l Be it known that I, GEORGE J. HENRY, Jr.,

' a citizen of .the United States, residing in the city and county of SanFrancisco, State of California, have invented certain new and useful Improvements in Re ulating Means for Hydraulic Nozzles; and Ido hereby declare the following to be a full, clear, and exf act description of the. same.

The present invention relates to that class of hydraulic Ynozzles designed for directing a '.jet of water onto the buckets of tangential water wheels, andthe object of the invention is to vary the quantity ofthe im act stream directed toward the buckets o the water wheel, so as toplace the same wholly or in part onto or ol" of the said buckets,v in accordance with' variations or load changes yas to the working' of the Water Wheel or hydraulic motor, the variation as to the impact stream issuing from the nozzle being accomplished Without deflection of. or change as to the nozzle position relative to the pipe line, while at the same time the shocks to or the Water ramming in the pipeline is avoided.

Ordinarily the object accomplished by the hereinafter described mechanism is attained either by the utilization of a deflectable nozzle, the deflection of which nozzle directs the issuing impact stream wholly or in part off of or onto the buckets ofthe water wheel or thecombination of such a nozzle with auX- l iliary means for actuating the needle valve to l' vary the outlet areaof the nozzle in accordance wit the changed position'thereof, in order to "proportion the stream to variations as to the Working load of the water wheel. In either case the n'ozzle employed isa deliectable one or one that is pivotedto thev mainline plipe. v 1

To comprehend the. invention reference should be had to the accompanying sheet. of

drawings, whereinf Figure 1 is aside view'i'n elevation, disclosing the main line Waterpipe, the discharge nozzle rigidly secured thereto, the by pass connection for preventing an excess of water pressure during sudden changes necessary to reduce the outlet area of the nozzle in accordance with load variations, and the neevdle valve within the nozzle, the nozzle tip, `the dash ot cylinder and the inner end portion oft e outlet cylinder being sectioned, the connection between the needle valve stem and the wheels governor being illustrated Fig. 2 is a plan view 4of the mechanspcication of Letters Patent.

Appunti@ mea August 29,1965. serial No. 276,253.

. Patented May 14,1907.

ism contained in Fig. -1 of the drawings, the Wheels governor and its connection with the stem of the needle valve being removed; and Fig. 3 "is a detail broken view ofthe dash pot cylinder and its by pass valve. In the drawings, the numeral 1 is'used to indicate the main pipe line, and 2 the discharge nozzle rigidly secured thereto for di-V recting the impact stream issuingrom the nozzle tip 3 onto the buckets 4 of the Water rwheel 5. f

Within the nozzle 2 works the needle valve or regulating device 6, which serves to regulate the outlet or discharge area ofthe nozzle to vary the volume or size of the impact stream issuing therefrom in accordance with variations as to the Working load of the water wheel or hydraulic motor 5.

The stem 7 ofthe regulating device eX- tends beyond the nozzle 2 and is connected to the governor 8 by means of the connections 8-82, which are actuated to operate the stem 7 to move the regulating device 6 l into and out of the nozzles tip 3 to control the outlet area thereof for the purpose of varying vthe quantity of the issuing impact stream in accordance With variations in the 'working load of the hydraulic motor.

On the stem 7 is slidably mounted a dash pot cylinder 9, the said stem extending;

throughthe-.stufng glands 10 and 10', to

prevent leakagebetween the said stem and the cylinder 9, Which cylinder is filled With oil or other liuid. The stem 7 Within the` cylinder 9 carries a piston head 11, the oil or uid within the cylinder 9 providing a fluid cushionagainst which the said head 11 acts. The cylinder 9 is rigidly connected through the rods 12 to a cross head 12, Which slides on the tie rods 13, said rods holding the by pass cylinder 13 to the nozzle 2. The said cross head 12 is connected through the stem '14 to the valve 14 which valve controls the The :dashv pot cylinder9 is provided with IOS IIO

.fia

f opposing'outlet ports 17 and 17', which are connected by the by pass valve 18 interposed lwithin tliepipe connection 18', said ports t leading respectively fro'm the chambers 19 I chamber 19' -these ports the oil or other liquid and19', formed within the cylinder k9 by means of the piston head 11. Through within the cylinder 9 is permitted to flow from one end chamber of the said cylinder tothe other,

-said transfer of the oil or other liquid occurring when a difference in pressure exists on one side. or the other of the piston head 11, of the stem 7, and thus permitting a relative motion between the stein 7 of the needle valve 6, and the stem .14 ofthe valve 14'.

Communication 'between the by-pass cylinder 13' and the fixed nozzle 2, is established by means of the connecting pipe 20, which acts to relieve the nozzle or pipe line of any excess of water pressure on a sudden reduction in the outlet area of t'he discharge nozzle, thus preventing any such pressure and byA so doing avoiding sudden shocks and pipe ramming which otherwise occur therein, tending to burst the pipe line; Safety means is thus provided to avoid the back water pressure, hence permitting the needle valve to be quickly moved to vary the impact stream issuing from the discharge outlet of the discharge nozzle'proportionately to variations in the working load of the motor.

The by-pass valve 18 is hinged to open full in one direction, permitting of a large uantity of oil or fluid to flow quickly from t e cylinder chamber 19 .into the cylinder chamber 19', while through a closure of the said valve when the reverse flow takes place, the oil or liquid Will flow very slowly from the into the chamber 19, as the fluid can only escape when the valve is closed through the perforation 192, formed in the said valve.

Thelimit of the-stroke permitted the stem 7 of the needle valve or regulating device, may be varied by means of the adjusting nut- 21, working on the projecting end of the 'stem 14, of the valve 14'.

The operation of the described mechanism is as follows. The pressure stream is being supplied through the lneedle, nozzle and the load is suddenly 'thrown off of the water wheel. The governor mechanism,of any ap-r,

. proved design, at once, through its connection with the needleval've stem 7, shifts the .position of the stem 7 longitudinally, throw- 111g wholly or ypartially the needle valve 6 into the nozzlels tip, therefore varying the outlet area thereof and reducing the quantity i of the impact stream issuing from'the nozzle. At the same instance the iston head. 11, within the dash pot cylin er 9, is forced against the body of oil in the said cylinder, thus causing the cylinder tomove withv and in the direction of the stem 7, drawing therewith the rods 12, the cross head 12', stern 14 ydschargepipe 15',

lotherwise would occur.

' etapes and the valve 14', thus opening or unseating the valve 14', exactly iii proportion to the closing ofthe valve or regulating device (i within the fixed nozzle 2. The valve 14' being thus opened, the water within the nozzle which would cause an excess pressure, is forced to niove or is directed into the relief pipe 20, and to flow into the outlet, take oil or discharge pipe 15', through the open port l5. lThe quantity of water flowing through the main line pipe thus remains for an instant the same as though the needle valve 6 had remained opened.

It will be understood that as the cross head 12' is moved with the stem 7, the springs 16 are compressed, which exerts a pressure onto the said cross head to force the saine in an opposite direction. It is obvious that if the va ve 14' be permitted to remain open while the needle valve is maintained in its closed or partly closed position, the result would be a waste of watei'. This is desired to save, and to 'so do the valve 14 must be closed against the escape of water through the discharge pipe 15'. As soon as the flow of water is established through the pi e 20 into the discharge pipe 15', preventing s ocks to and water rammin of the pi e line, which ordinarily results from a su den closing of the needle valve of the discharge nozzle, .the pressure of the back flowing water onto the valve 14' tends to close the same. The governor mechanism holds the needle valve and its stem rmlyin position while the combined pressure of the water on the valve 14' and of the compressed springs 16, against the crosshead 12', acts to move the valve stein 14 to close the said valve 14'. The force thus exerted causes a pressure within the oil conipartment or chamber 19' of the cylinder 9, resulting in the oil or li uid in said compartment or chamber being s owly forced through the by pass valve 18, into the compartment or chamber 19, thus allowing the cylinder 9 to slowly move rearwardly on the needle valve stem and the valve 14' to gradually seat itself to cut off the flow of water into they thereby saving the water which otherwise would run to waste.

By the use of the described device the impact stream for the water wheel may be accurately and quickly regulated proportionately to the motor, and this without interfering with the safety of the pipe line, at the same time only such a waste or loss of water is occasioned as is absolutely necessary to relieve the pipe line of the sudden excess of water pressure which The joints rendered necessary by the employment of a deectable nozzle to'vary the impact stream relative to the workinoP load of Ithe. hydraulic motor, is avoided by t e present invention, while the position of the impact stream relative to the buckets of the Working load of the hydraulic- TIO IZO

waterwheel or hydraulic motor is not varied A l as in the case of a deflecting nozzle. This is.

a feature of importance, inasmuch as the stream at all times bears onto the buckets at relatively the same position, thus securing the maximum elliciency at all times.

Having thus described the invention, what l is claimed as new and desired to be protected Vby Letters Patent is The combination with a water'wheel, of a fixed nozzle for directing an impact stream thereon, 'a needle valve for controlling the outlet area thereof, a stem extending therefrom outside of the nozzle, an overflow outlet for a portion of the water flowing toward the nozzle when its outlet area is reduced, of connection between `said outlet and the Xed nozzle, a dash pot cylinder slidable on the stem of the needle valve,a piston'head on said stem within the cylinder, communicag tion between each end of the cylinder for the flow of fluid toward and from the res ect-ive ends, means for moving the stem of t e neethe overflow outlet.

In testimony whereof I have hereunto affixed my signature in the presence of witnesses.

GEGRGE J. HENRY, JR. Witnesses N. A. ACKER,

D. B. RICHARDS. 

